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Angiosarcoma in FNA smears: diagnostic accuracy, morphology, immunocytochemistry and differential diagnoses


, : Angiosarcoma in FNA smears: diagnostic accuracy, morphology, immunocytochemistry and differential diagnoses. Cytopathology 21(5): 311-319

The aim of our study was to analyse the diagnostic accuracy in recognizing angiosarcoma from fine needle aspiration (FNA) samples and to determine morphological features of angiosarcoma in cytology. FNA samples from 18 histologically confirmed angiosarcomas obtained between 1985 and 2009 were included in the study. Original cytological diagnoses were retrieved, smears reviewed and morphological features analysed: cellularity, smear pattern, cell morphology, contents of background. Outcome of immunocytochemistry was noted and additional reactions performed if material was available. There were 13 primary angiosarcomas and five recurrent tumours; nine tumours were epithelioid. Twelve tumours were cytologically diagnosed as malignant, three as suspicious and three were judged unsatisfactory. Only two primary tumours were diagnosed as vascular. According to morphology, tumours were divided into those with predominantly epithelioid cells and those with predominantly spindle cells. Within these two groups were variations due to grade of tumour. Cytomorphology did not correlate well with histology in mixed and spindle cell types of angiosarcomas. Immunocytochemistry was applied in seven cases, specific vascular marker CD31 only twice at the time of diagnosis and three times retrospectively. Angiosarcomas are difficult to recognize on FNA smears when they lack the typical dual, spindle and epithelioid cell population and when they occur in internal organs where carcinomas are more common. Very few reliable data are available concerning specificity of CD31 on cytological material.

US$19.90

PMID: 20105214

DOI: 10.1111/j.1365-2303.2009.00726.x


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